Fix Debugger Windows integration tests not running

[andrewlock]

Summary of changes

Fixes the debugger tests filter so we run Windows Integration tests

Reason for change

The debugger tests were generating an invalid filter, so no tests have been running on Windows.

Implementation details

Fix the check for an empty Filter

Test coverage

This is the test

[andrewlock]

Execution-Time Benchmarks Report ⏱️

Execution-time results for samples comparing the following branches/commits:

• This PR (6754)
• master

Execution-time benchmarks measure the whole time it takes to execute a program. And are intended to measure the one-off costs. Cases where the execution time results for the PR are worse than latest master results are shown in red. The following thresholds were used for comparing the execution times:

• Welch test with statistical test for significance of 5%
• Only results indicating a difference greater than 5% and 5 ms are considered.

Note that these results are based on a single point-in-time result for each branch. For full results, see the dashboard.

Graphs show the p99 interval based on the mean and StdDev of the test run, as well as the mean value of the run (shown as a diamond below the graph).

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gantt
    title Execution time (ms) FakeDbCommand (.NET Framework 4.6.2) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6754) - mean (69ms)  : 67, 71
     .   : milestone, 69,
    master - mean (69ms)  : 67, 71
     .   : milestone, 69,

    section CallTarget+Inlining+NGEN
    This PR (6754) - mean (1,004ms)  : 984, 1024
     .   : milestone, 1004,
    master - mean (1,006ms)  : 977, 1034
     .   : milestone, 1006,

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gantt
    title Execution time (ms) FakeDbCommand (.NET Core 3.1) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6754) - mean (102ms)  : 100, 105
     .   : milestone, 102,
    master - mean (102ms)  : 100, 105
     .   : milestone, 102,

    section CallTarget+Inlining+NGEN
    This PR (6754) - mean (691ms)  : 675, 708
     .   : milestone, 691,
    master - mean (689ms)  : 673, 705
     .   : milestone, 689,

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gantt
    title Execution time (ms) FakeDbCommand (.NET 6) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6754) - mean (89ms)  : 88, 91
     .   : milestone, 89,
    master - mean (89ms)  : 88, 91
     .   : milestone, 89,

    section CallTarget+Inlining+NGEN
    This PR (6754) - mean (643ms)  : 628, 658
     .   : milestone, 643,
    master - mean (648ms)  : 627, 669
     .   : milestone, 648,

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gantt
    title Execution time (ms) HttpMessageHandler (.NET Framework 4.6.2) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6754) - mean (191ms)  : 187, 194
     .   : milestone, 191,
    master - mean (191ms)  : 187, 194
     .   : milestone, 191,

    section CallTarget+Inlining+NGEN
    This PR (6754) - mean (1,111ms)  : 1083, 1139
     .   : milestone, 1111,
    master - mean (1,109ms)  : 1089, 1128
     .   : milestone, 1109,

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gantt
    title Execution time (ms) HttpMessageHandler (.NET Core 3.1) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6754) - mean (270ms)  : 266, 273
     .   : milestone, 270,
    master - mean (271ms)  : 267, 275
     .   : milestone, 271,

    section CallTarget+Inlining+NGEN
    This PR (6754) - mean (878ms)  : 850, 907
     .   : milestone, 878,
    master - mean (878ms)  : 854, 901
     .   : milestone, 878,

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gantt
    title Execution time (ms) HttpMessageHandler (.NET 6) 
    dateFormat  X
    axisFormat %s
    todayMarker off
    section Baseline
    This PR (6754) - mean (263ms)  : 260, 266
     .   : milestone, 263,
    master - mean (262ms)  : 256, 269
     .   : milestone, 262,

    section CallTarget+Inlining+NGEN
    This PR (6754) - mean (855ms)  : 830, 880
     .   : milestone, 855,
    master - mean (857ms)  : 828, 887
     .   : milestone, 857,

[datadog-datadog-prod-us1]

Datadog Report

All test runs ad56738 🔗

❌ 2 Total Test Services: 1 Failed, 1 Passed
❄️ 1 with New Flaky

Test Services

Service Name	Failed	Known Flaky	New Flaky	Passed	Skipped	Total Time	Test Service View
dd-trace-dotnet	2120	392	87	267360	4874	65h 52m 7.66s	Link
exploration_tests	0	0	0	22085	3	1h 26m 46.5s	Link

❌ Failed Tests (2120)

This report shows up to 5 failed tests.

• TestExceptionReplay - Datadog.Trace.Debugger.IntegrationTests.ExceptionReplay.AspNetCore5ExceptionReplayEnabledDynamicInstrumentationDisabled - ❄️ Known flaky - Details

  Expand for error

   Expected relevantSpans to contain at least 1 item(s) because we want to ensure that we don't timeout while waiting for spans from the mock tracer agent, but found 0: {empty}.
  

• TestExceptionReplay - Datadog.Trace.Debugger.IntegrationTests.ExceptionReplay.AspNetCore5ExceptionReplayEnabledDynamicInstrumentationDisabled - ❄️ Known flaky - Details

  Expand for error

   Expected relevantSpans to contain at least 1 item(s) because we want to ensure that we don't timeout while waiting for spans from the mock tracer agent, but found 0: {empty}.
  

• TestExceptionReplay - Datadog.Trace.Debugger.IntegrationTests.ExceptionReplay.AspNetCore5ExceptionReplayEnabledDynamicInstrumentationDisabled - ❄️ Known flaky - Details

  Expand for error

   Expected relevantSpans to contain at least 1 item(s) because we want to ensure that we don't timeout while waiting for spans from the mock tracer agent, but found 0: {empty}.
  

• TestExceptionReplay - Datadog.Trace.Debugger.IntegrationTests.ExceptionReplay.AspNetCore5ExceptionReplayEnabledDynamicInstrumentationDisabled - ❄️ Known flaky - Details

  Expand for error

   Expected relevantSpans to contain at least 1 item(s) because we want to ensure that we don't timeout while waiting for spans from the mock tracer agent, but found 0: {empty}.
  

• TestExceptionReplay - Datadog.Trace.Debugger.IntegrationTests.ExceptionReplay.AspNetCore5ExceptionReplayEnabledDynamicInstrumentationDisabled - ❄️ Known flaky - Details

  Expand for error

   Expected relevantSpans to contain at least 1 item(s) because we want to ensure that we don't timeout while waiting for spans from the mock tracer agent, but found 0: {empty}.