git.properties: stop fallback-file refresh from overriding ProjectReference opt-out

[bart-vmware]

Description

WriteGitPropertiesFallbackFile forced GenerateGitProperties=true as a global MSBuild property, which propagates to every ProjectReference by default and silently overrode a referenced project's own opt-out (e.g. a shared ServiceDefaults project with GenerateGitProperties=false), generating a fallback file it explicitly didn't want. Removing the forced property lets each project's own auto/true/false decision stand for itself and for anything referencing it.

Also documents and tests the Directory.Build.targets wrapper needed to safely refresh git.properties across a whole solution, since calling the target directly fails with MSB4057 on any project that doesn't reference this package at all.

Quality checklist

• Your code complies with our Coding Style.
• You've updated unit and/or integration tests for your change, where applicable.
• You've updated documentation for your change, where applicable.
  If your change affects other repositories, such as Documentation and/or Samples, add linked PRs here.
• There's an open issue for the PR that you are making. If you'd like to propose a new feature or change, please open an issue to discuss the change or find an existing issue.
• You've added required license files and/or file headers (explaining where the code came from with proper attribution), where code is copied from StackOverflow, a blog, or OSS.

[github-actions]

Summary - All Code Coverage (ubuntu-latest)

Assembly	Line coverage	Branch coverage
Steeltoe.Bootstrap.AutoConfiguration	97.4%	83.3%
Steeltoe.Common	86.4%	77%
Steeltoe.Common.Certificates	97.2%	80.2%
Steeltoe.Common.Hosting	83.5%	65%
Steeltoe.Common.Http	97.4%	80.9%
Steeltoe.Common.Logging	81.1%	56.2%
Steeltoe.Common.Net	64.5%	66.6%
Steeltoe.Configuration.Abstractions	96.3%	89.4%
Steeltoe.Configuration.CloudFoundry	98.4%	92.7%
Steeltoe.Configuration.ConfigServer	91.6%	86.2%
Steeltoe.Configuration.Encryption	97.6%	87.8%
Steeltoe.Configuration.Kubernetes.ServiceBindings	95.6%	82.6%
Steeltoe.Configuration.Placeholder	93.8%	82.6%
Steeltoe.Configuration.RandomValue	93.2%	83.3%
Steeltoe.Configuration.SpringBoot	98.3%	85%
Steeltoe.Connectors	94.5%	85.6%
Steeltoe.Connectors.EntityFrameworkCore	79.7%	65.3%
Steeltoe.Discovery.Configuration	96.3%	75%
Steeltoe.Discovery.Consul	91.5%	84%
Steeltoe.Discovery.Eureka	91.6%	81.3%
Steeltoe.Discovery.HttpClients	89.9%	91.4%
Steeltoe.Logging.Abstractions	99.4%	95.6%
Steeltoe.Logging.DynamicConsole	100%	92.3%
Steeltoe.Logging.DynamicSerilog	99.1%	95.4%
Steeltoe.Management.Abstractions	100%	100%
Steeltoe.Management.Endpoint	96%	87.1%
Steeltoe.Management.GitProperties.Build	95.1%	83.9%
Steeltoe.Management.Prometheus	95.8%	76.9%
Steeltoe.Management.Tasks	95.2%	80%
Steeltoe.Management.Tracing	100%	75%
Steeltoe.Security.Authentication.JwtBearer	100%	93.7%
Steeltoe.Security.Authentication.OpenIdConnect	87.7%	66.6%
Steeltoe.Security.Authorization.Certificate	95.6%	61.5%
Steeltoe.Security.DataProtection.Redis	100%	****

[TimHess]

LGTM

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud