Plan to release v3.5.33

[ivanvc]

What would you like to be added?

The etcd patch release criteria has been met for our release-3.5 stable branch, so we should release v3.5.33.

Work in progress CHANGELOG is: https://github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.5.md#v3533-tbc

The list of commits included since the previous release is: v3.5.32...release-3.5:

• [release-3.5] Bump Go to 1.25.12 #22061
• [release-3.5] Bump golang.org/x/net to v0.56.0 and golang.org/x/text to v0.39.0 #22138
• [release-3.5] deps: bump google.golang.org/grpc to 1.82.1 #22153
• [release-3.5] Set a 5-minutes ReadHeaderTimeout for client http.Server #22163
• [release-3.5] Set a tlsHandshakeTimeout for tlsListener #22160
• [release-3.5] Fix unsynchronized range over leaseCache.entries #22159
• [release-3.5] Fix the costTxnReq ignores nested RequestTxn issue #22167
• [release-3.5] Fix unbounded io.ReadAll on peer lease HTTP handler body #22161

Outstanding tasks before releasing this version:

• TBD

Release team

GitHub handle	Role
@ivanvc	Release Lead

Why is this needed?

Regular patch releases are vital to ensure our users have bug-free and secure software.