SOLR-17961 Remove deprecated Tika Extraction Backend

[janhoy]

https://issues.apache.org/jira/browse/SOLR-17961

Making 'tikaserver' the default. This effectively removes all bundled Tika Parsers.

Review checklist (please tick if you reviewed that part):

• Code changes when slicing out the backend from ExtractionHandler
• Gradle build - did we remove the correct dependencies?
• licenses folder - are the corresponding files gone?
• NOTICE file - did we remove the correct Copyright statements?
• Reference guide indexing-with-tika.adoc - does it still read well?
• Make sure starting TikaServer is mentioned in various tutorials / docs
• Give proper error message if someone starts Solr 10 with extracting handler without tikaserver.url configured
• Give error messages if users try to configure old, removed configuration options
• Fix the BATS test test_extraction.bats to work, if so it must stand up a TikaServer somehow, or remove it?

Will be merged to main, branch_10x and branch_10_0

[Copilot]

Pull Request Overview

This PR removes the deprecated in-process Tika backend and consolidates Solr’s ExtractingRequestHandler to use only the external Tika Server backend.

• Remove LocalTikaExtractionBackend and related code/tests; require Tika Server (tikaserver) exclusively
• Update documentation to reflect tikaserver-only support and configuration
• Clean up module dependencies and licenses associated with Tika parsers and other removed components

Reviewed Changes

Copilot reviewed 186 out of 194 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-10.adoc	Adds upgrade note about removing LocalTikaExtractionBackend and requiring tikaserver.url
solr/solr-ref-guide/modules/indexing-guide/pages/indexing-with-tika.adoc	Rewrites Solr Cell docs for tikaserver-only; updates examples, parameters, and Tika Server config
solr/modules/extraction/src/java/org/apache/solr/handler/extraction/ExtractingRequestHandler.java	Removes local backend configuration and enforcement; requires tikaserver.url; validates backend name
solr/modules/extraction/src/java/org/apache/solr/handler/extraction/ExtractionBackend.java	Updates method Javadoc to remove local/tikaserver examples
solr/modules/extraction/src/java/org/apache/solr/handler/extraction/ParseContextConfig.java	Removes parse-context configuration class (no longer applicable)
solr/modules/extraction/src/java/org/apache/solr/handler/extraction/LocalTikaExtractionBackend.java	Removes Local Tika backend implementation
solr/modules/extraction/src/test/**	Removes tests specific to the local backend and parse context config; adjusts test solrconfig defaults
solr/modules/extraction/build.gradle	Drops Tika parsers dependency, retains tika-core and Jetty client for tikaserver backend
solr/modules/extraction/gradle.lockfile	Prunes dependencies associated with removed parsers and transitive artifacts
solr/licenses/**	Removes licenses/notice files for dependencies no longer used

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[epugh]

This is an impressive PR! -1001 lines for adding 128 lines. I look forward to seeing Solrbot close a million PR's that are no longer needed!

[janhoy]

This is an impressive PR! -1001 lines for adding 128 lines. I look forward to seeing Solrbot close a million PR's that are no longer needed!

11.106 lines removed, 131 added :)

[epugh]

Lgtm. Small questions.

[Copilot]

Pull Request Overview

Copilot reviewed 197 out of 205 changed files in this pull request and generated 5 comments.

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[epugh]

Ran through the bats tests and the tutorials and ref guide pages. couple small edits... Feedback on the bats tests, but they aren't critical! LGTM.... Ship it!

[janhoy]

Thanks for the review. I'll do some moving of bats methods, remove last NOCOMMIT, get all tests passing and then ship.