[Do not merge] Test for prerelease experimental instrumentation v0.63.1#8157

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flc1125 wants to merge 9 commits intoopen-telemetry:mainfrom

flc1125:prerelease_experimental-instrumentation_v0.63.1

Commits on Nov 8, 2025

fix(otelhttp): change Version() to const and update changelog
dogedede
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