[jdk11u-dev] RFR: 8272914: Create hotspot:tier2 and hotspot:tier3 test groups

[Aleksey Shipilev]

Unclean backport to introduce `hotspot:tier2` and `hotspot:tier3` groups. It is unclean because there is no `hotspot_tier2_serviceability` (added by test reshufflings in JDK-8231981) and no `tier2_gc_epsilon` test groups (added by reshuffling for Critical JNI tests, which do not exist in 11u). 

This is a stepping stone towards introducing `tier4` test group that catches everything else.

Additional testing:
 - [x] Linux x86_64 `hotspot:tier2` passes
 - [x] Linux x86_64 `hotspot:tier3` passes

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Commit messages:
 - Remove test groups that do not exist in 11u
 - Backport 5ee5dd9b18fb5adc563a65bd1a29779eda675d61

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/456/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=456&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272914
  Stats: 9 lines in 1 file changed: 9 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/456.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/456/head:pull/456

PR: https://git.openjdk.java.net/jdk11u-dev/pull/456