Gather more diagnostics when restore fails (flaky tests)

[bart-vmware]

Description

Tests for git.properties occasionally fail with the following error in CI builds:

[MSB4181] The "RestoreTask" task returned false but did not log an error.

This PR adds additional diagnostics, in an attempt to chase down the root cause next time it happens.

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	92.9%	84.4%
Steeltoe.Common.Certificates	95.6%	84.5%
Steeltoe.Common.Hosting	83.5%	65%
Steeltoe.Common.Http	97.4%	80.9%
Steeltoe.Common.Logging	80.6%	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	91.4%	85.9%
Steeltoe.Configuration.Encryption	97.6%	87.5%
Steeltoe.Configuration.Kubernetes.ServiceBindings	95.6%	82.1%
Steeltoe.Configuration.Placeholder	94%	82.6%
Steeltoe.Configuration.RandomValue	93.2%	83.3%
Steeltoe.Configuration.SpringBoot	98.3%	85%
Steeltoe.Connectors	94.5%	85.2%
Steeltoe.Connectors.EntityFrameworkCore	81%	70.8%
Steeltoe.Discovery.Configuration	96.3%	75%
Steeltoe.Discovery.Consul	91.5%	84.5%
Steeltoe.Discovery.Eureka	90.2%	81.8%
Steeltoe.Discovery.HttpClients	89.9%	91.1%
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	95.9%	87%
Steeltoe.Management.GitProperties.Build	95.2%	83.9%
Steeltoe.Management.Prometheus	96.8%	81.2%
Steeltoe.Management.Tasks	95.2%	80%
Steeltoe.Management.Tracing	100%	75%
Steeltoe.Security.Authentication.JwtBearer	100%	95.6%
Steeltoe.Security.Authentication.OpenIdConnect	87.7%	77.2%
Steeltoe.Security.Authorization.Certificate	96.8%	66.6%
Steeltoe.Security.DataProtection.Redis	100%	****

[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