Upgrade Solana to 2.0.15

[naviat]

• v2.0: Update latest release variable for agave docs (backport of Update latest release variable for agave docs anza-xyz/agave#3220) by @mergify in v2.0: Update latest release variable for agave docs (backport of #3220) anza-xyz/agave#3221
• v2.0: runtime: use leader schedule epoch to serve sol_get_epoch_stake (backport of runtime: use leader schedule epoch to serve sol_get_epoch_stake anza-xyz/agave#3279) by @mergify in v2.0: runtime: use leader schedule epoch to serve sol_get_epoch_stake (backport of #3279) anza-xyz/agave#3312
• Pin SPL Token CLI version to v4.1.1 by @willhickey in Pin SPL Token CLI version to v4.1.1 anza-xyz/agave#3344
• Revert - Cleanup - Removes the owner form the result of filter_executable_program_accounts() anza-xyz/agave#879 and Refactor - Remove program_accounts_map from account_loader anza-xyz/agave#768 (v2.0 backport of Revert - #879 and #768 anza-xyz/agave#3521) by @Lichtso in Revert - #879 and #768 (v2.0 backport of #3521) anza-xyz/agave#3511
• v2.0: Revert "rolls back chained Merkle shreds for testnet downgrade (rolls back chained Merkle shreds for testnet downgrade anza-xyz/agave#3194)" (backport of Revert "rolls back chained Merkle shreds for testnet downgrade (#3194)" anza-xyz/agave#3503) by @mergify in v2.0: Revert "rolls back chained Merkle shreds for testnet downgrade (#3194)" (backport of #3503) anza-xyz/agave#3504
• v2.0: Store epoch in MaxAge (backport of Store epoch in MaxAge anza-xyz/agave#3485) by @mergify in v2.0: Store epoch in MaxAge (backport of #3485) anza-xyz/agave#3501
• Feature - disable account loader special case by @Lichtso in Feature - disable account loader special case (v2.0 backport of #3548) anza-xyz/agave#3514

[guardrails]

⚠️ We detected 1 security issue in this pull request:

Insecure Access Control (1)

Severity	Details	Docs
High	Title: Missing User Instruction solana-docker/Dockerfile Line 1 in 778d8d1 FROM anzaxyz/agave:v2.0.15	📚

More info on how to fix Insecure Access Control in Dockerfile.

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