all: activate pbss as experimental feature (#26274)
* all: activate pbss
* core/rawdb: fix compilation error
* cma, core, eth, les, trie: address comments
* cmd, core, eth, trie: polish code
* core, cmd, eth: address comments
* cmd, core, eth, les, light, tests: address comment
* cmd/utils: shorten log message
* trie/triedb/pathdb: limit node buffer size to 1gb
* cmd/utils: fix opening non-existing db
* cmd/utils: rename flag name
* cmd, core: group chain history flags and fix tests
* core, eth, trie: fix memory leak in snapshot generation
* cmd, eth, internal: deprecate flags
* all: enable state tests for pathdb, fixes
* cmd, core: polish code
* trie/triedb/pathdb: limit the node buffer size to 256mb
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Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Péter Szilágyi <peterke@gmail.com>
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