RFR: 8335159: Move method reference to lambda desugaring before Lower [v5]

[Maurizio Cimadamore]

> As we recently [moved](https://github.com/openjdk/jdk/pull/19836) the translation of "simple" method references from `LambdaToMethod` to `Lower`, it became clearer that this step in fact would benefit from running even *earlier*, as it depends on the synthetic casts generated by `TransTypes` (e.g. if one or more desugared lambda parameters have a type that is either an intersection or a union type).
> Moving the translation earlier would allow us not to *guess* which casts would need to be introduced, and just running `TransTypes::translate` on the desugaring code would take into account the type mismatches.

Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision:

  Fix test

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19903/files
  - new: https://git.openjdk.org/jdk/pull/19903/files/f74b0314..ee3345d8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19903&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19903&range=03-04

  Stats: 7 lines in 1 file changed: 0 ins; 2 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/19903.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19903/head:pull/19903

PR: https://git.openjdk.org/jdk/pull/19903