Deprecate Span Queries in favour of Interval Queries

[mayya-sharipova]

Description

Span and Interval queries both have the same function of positional queries to allow control order and proximity of terms.

Interval queries were developed recently and have several benefits over Span queries:

• Simpler interface
• Intervals queries provide scores unlike Span queries
• Interval queries are more performant?

Tasks

• Add range and regexp rules to Interval Queries.
  • Done in Lucene PR .
  • Done for ES Add range and regexp Intervals #111465
  • Make range open-ended
• For multi term Interval rules set max_expansions parameter to indices.query.bool.max_clause_count
  • DONE for ES Multi term intervals: increase max_expansions #112826
• In progress: A blog explaining how to use Interval queries instead of Span queries
• Deprecate Span queries

### Tasks

[elasticsearchmachine]

Pinging @elastic/es-search (Team:Search)

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)