8370214: [21u] Remove -Xdebug and -Xnoagent from tests: backport parts of 8227229 and 8312072#2353

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GoeLin wants to merge 2 commits intoopenjdk:masterfrom

GoeLin:goetz_backport_8312072_8227229

Commits on Oct 17, 2025

backport test parts of 8312072: Deprecate for removal the -Xnoagent option
GoeLin
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backport usages of flag -Xdebug, see 8227229: Deprecate the launcher -Xdebug/-debug flags that have not done anything since Java 6
GoeLin
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