Several comments in src/mongo/db/query/compiler/optimizer/join contain minor spelling or grammar typos. Fix these without changing behavior.

Specific typos to fix:

• catalog_stats.h: Statisitics -> Statistics
• join_cost_estimator.h: Estiamte -> Estimate
• join_cost_estimator_impl.cpp: neglible -> negligible
• join_cost_estimator_impl.cpp: truely -> truly
• plan_enumerator_helpers.h: Stays constants -> Stays constant
• plan_enumerator_helpers.h: satify -> satisfy
• predicate_inferer.h: classses -> classes
• predicate_inferer.h: the the STP -> the STP
• predicate_extractor_test.cpp: An expressions constains... -> An expression that contains...
• predicate_extractor_test.cpp: constains -> contains
• reorder_joins.cpp: rety -> retry
• reorder_joins.cpp: maxRandomHintTries -> maxRandomHintRetries

This should be a comment-only cleanup with no test behavior changes.