chore(jobsdb): omit workspaceId tag when it doesn't correspond to an actual workspace

[atzoum]

Description

Not including a workspaceId tag in jobsdb metrics when its value is empty or _all_

Notion Ticket

Link

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.04 ⚠️

Comparison is base (e57362e) 52.65% compared to head (35eef2f) 52.62%.

❗ Current head 35eef2f differs from pull request most recent head b56a083. Consider uploading reports for the commit b56a083 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3057      +/-   ##
==========================================
- Coverage   52.65%   52.62%   -0.04%     
==========================================
  Files         334      334              
  Lines       52198    52195       -3     
==========================================
- Hits        27486    27467      -19     
- Misses      23117    23129      +12     
- Partials     1595     1599       +4     

Impacted Files	Coverage Δ
services/metric/measurement.go	100.00% <ø> (ø)
jobsdb/jobsdb_utils.go	78.76% <100.00%> (-0.29%)	⬇️
jobsdb/migration.go	73.96% <0.00%> (-2.32%)	⬇️
processor/processor.go	86.79% <0.00%> (-0.57%)	⬇️
services/rsources/handler.go	74.65% <0.00%> (+0.82%)	⬆️
testhelper/log/log.go	11.53% <0.00%> (+3.84%)	⬆️

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