v0.43.1

update: add 0.43.1 changelog entry and version bump (#2197)

* security: bump golang.org/x/crypto and golang.org/x/text to fix CVEs (#2186)

* security: bump golang.org/x/crypto and golang.org/x/text to fix CVEs

* change CVE update

* security: backport Go 1.26.8 (#2194)

* signals: add aix build constraint and SIGVTALRM

* security: bump Go to 1.26.9 and golang.org/x/net to v0.60.0 (#2196)

* update: add 0.43.1 changelog entry and version bump

* security: bump Go to v1.26.10 to fix CVE-2026-111943, CVE-2026-78663, CVE-2026-78669

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Co-authored-by: Mridul Gupta <mridul.gupta@hashicorp.com>