[jdk11u-dev] RFR: 8270184: [TESTBUG] Add coverage for jvmci ResolvedJavaType.toJavaName() for lambdas

[Severin Gehwolf]

This backport has the regression test for #120. It fails without that patch and passes after. I intend to integrate those two together. Patch didn't apply clean due to differences in the same code location, but the patch itself is the same as for JDK 18.

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Commit messages:
 - Backport 6a9bc108736522897f03a75c83e90e2c2a183d27

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/123/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=123&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8270184
  Stats: 13 lines in 1 file changed: 13 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/123.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/123/head:pull/123

PR: https://git.openjdk.java.net/jdk11u-dev/pull/123