RFR: 8326204: yield statements doesn't allow cast expressions with more than 1 type arguments [v2]

[Aggelos Biboudis]

> A valid use of `yield` that includes a cast to a generic type with multiple parameters, was misdetected by `blockStatement` in parser. This PR addresses this issue.

Aggelos Biboudis has updated the pull request incrementally with one additional commit since the last revision:

  Address comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/18196/files
  - new: https://git.openjdk.org/jdk/pull/18196/files/25f6ffec..f688c1e3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18196&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18196&range=00-01

  Stats: 21 lines in 4 files changed: 16 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/18196.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18196/head:pull/18196

PR: https://git.openjdk.org/jdk/pull/18196