Less than 100 response status implies bad connection (openrewrite#3977)

* Zero or lower response code should not be treated as an existing server

* Less than 100 response code should not be treated as an existing server

Fix assorted groovy parsing errors around labels, parentheses, and wh…

…itespace.

Added verification that only whitespace is present within Spaces within parser tests.

Parentheses fixes:
* Type casts inside parentheses
* Constructor invocations inside parentheses

Label fixes:
* Labeled For loops
* Labeled For-each loops

Other whitespace:
* Quoted method declarations
* Semicolon-terminated statements inside switch
* Numeric literals that use 'L', 'd', or 'f' suffixes to specify their type left the specifier in whitespace

Fix parsing of Groovy sources containing extra parentheses on Java 8

fix: profile specific plugins were not matched (openrewrite#3967)

Normalization of maven repositories that don't permit directory listi…

…ng (openrewrite#3961)

Add null check. A non null ref can point to a null objectId: (openrew…

…rite#3953)

* Add null check. A non null ref can point to a null objectId:

SymbolicRef[HEAD -> refs/heads/main=0000000000000000000000000000000000000000(-1)]

* cleanup

Find Committers on freshly cloned repositories (openrewrite#3952)

* When a repository is freshly cloned and no other actions have been taken (like pull) ORIG_HEAD is not available. Using HEAD as a fallback works to find the committers.

* null check on ref

Reduce log spam from MavenPomDownloader.

Only send downloadError event when all repositories have failed to be accessed.

Prevent exceptions on missing GradleProject markers (openrewrite#3945)

* Prevent exceptions on missing GradleProject markers

* Restore updating gradle settings in isolation

Add repositoryAccessFailed event to ResolutionEventListener and Maven…

…PomDownloader