chore: bump api-specs to 0.15.0

[jiexi]

Explanation

Bumps api-specs to 0.15.0 in chain-agnostic-permissions and multichain-api-middleware packages in order to support 7715 methods over the Multichain API

References

Fixes: https://consensyssoftware.atlassian.net/browse/WAPI-1548

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

---

Note

Medium Risk
Touches permission/middleware RPC allowlists via api-specs; scope is dependency-only but expands which wallet methods sessions can advertise.

Overview
Bumps @metamask/api-specs from ^0.14.0 to ^0.15.0 in @metamask/chain-agnostic-permission and @metamask/multichain-api-middleware, with lockfile and changelog updates, so Multichain API stacks can use the new spec (EIP-7715 execution-permission RPCs).

The only functional test change is an updated KnownRpcMethods inline snapshot for eip155, adding wallet_requestExecutionPermissions, wallet_getGrantedExecutionPermissions, and wallet_getSupportedExecutionPermissions—aligned with methods pulled from the upgraded OpenRPC document, not new hand-written constants in this PR.

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​metamask/​api-specs@​0.14.0 ⏵ 0.15.0	+1		+1	+8

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