Sync eng/common directory with azure-sdk-tools for PR 8294 (#35694)

* consume newest stable version of the test-proxy

* remove the override pin such that CI reverts to honoring eng/common/testproxy/target_version.txt again

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Co-authored-by: Scott Beddall <[email protected]>

Author: azure-sdk

eng/common/testproxy/target_version.txt

@@ -1 +1 @@
-1.0.0-dev.20240410.1
+1.0.0-dev.20240516.2