Solr backend: fix LIKE wildcard translation

[epifanio]

Problem

SOLRDSLEvaluator.like() split the converted pattern on * and only looked at p[0] and p[1]:

LIKE pattern	Before	Issue
%Arctic%	{!complexphrase}field:*Arctic	trailing wildcard dropped: "contains" became "ends with"
Arc%tic	{!complexphrase}field:"Arc"*"tic"	not a wildcard term; parses as a loose OR
this is % test	{!complexphrase}field:"this is "*" test"	same; only matched by accident

In addition, routing every wildcard pattern through {!complexphrase} makes Solr rewrite wildcards into scoring boolean queries. On a large index a broad term fails with maxClauseCount is set to 1024 (seen with {!complexphrase}full_text:*Arctic* on a ~2.3M document core), whereas full_text:*arctic* runs fine.

Change

• Single-token patterns become plain wildcard term queries, with Solr syntax characters escaped: %Arctic% → field:*Arctic*, Arc%tic → field:Arc*tic, %met:adc% → field:*met\:adc*.
• Multi-word patterns are split at standalone % tokens into segments that must all match: this is % test → +field:"this is" +field:"test". Wildcards at segment edges are dropped, since the gap already means "anything" (%sea ice% → field:"sea ice"). {!complexphrase} is only used when a phrase still contains a wildcard (this is . test → {!complexphrase}field:"this is ? test").
• Patterns without wildcards stay phrase queries; embedded " is now escaped.
• NOT LIKE negates the whole expression (-(+a +b) for multiple segments).

Known limitation: word order across a % gap is not enforced (a superset of strict LIKE semantics on a tokenized field).

Tests

• New live tests: %nothe%, ano%er, t.st and NOT LIKE '%nothe%' against the test core.
• New translation-only tests covering the single-token, escaping, multi-word and complexphrase paths.
• Existing test_like / test_combination_like_not pass unchanged.

Ran tests/backends/solr against Solr 9.10 (same as CI): 23 passed. test_spatial and test_spatial_and_text fail identically on unmodified main and are unrelated to this change. ruff, ruff-format and mypy pre-commit hooks pass.