Fix MATCH_RECOGNIZE exclusion after symbol

[osipovartem]

Summary

• distinguish a Snowflake {- symbol -} exclusion from a {n,m} repetition quantifier
• allow exclusions to follow another pattern symbol without an extra group
• add a parser regression test for S1 {- S2 -}

Snowflake syntax reference: https://docs.snowflake.com/en/sql-reference/constructs/match_recognize#pattern-specifying-the-pattern-to-match

Validation

• cargo +1.95.0 test --test sqlparser_common test_match_recognize_patterns
• cargo +1.95.0 clippy --all-targets -- -D warnings
• cargo +1.95.0 fmt --all -- --check