chore(deps): update dependency hashicorp/nomad to v2

[renovate]

This PR contains the following updates:

Package	Update	Change
hashicorp/nomad	major	1.11.3 → 2.0.0

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Release Notes

hashicorp/nomad (hashicorp/nomad)

v2.0.0

Compare Source

FEATURES:

• config: add nonproduction config option for server, license, and reporting config [GH-27646]
• core (Enterprise): Enable parsing and reporting with IBM PAO licenses

SECURITY:

• build: upgrade Go to 1.26.2 [GH-27831]
• ui: Increased the client-side generated OIDC nonce entropy to 256-bit. [GH-27749]

IMPROVEMENTS:

• build (Enterprise): Added support for ppc64le CPU architecture on Linux
• build: Upgrade to Go 1.26 [GH-27685]
• metrics: adds a metric for total agent http connections [GH-26756]
• secrets: increase secrets plugin execution timeout to 60s [GH-27779]
• server: Added support for raft-WAL logstore [GH-27493]
• variables: Add variable events to the event stream [GH-27637]

BUG FIXES:

• agent: Fixed a potential panic in agents using systemd notification [GH-27746]
• agent: fix api.Job.Version used in job PUT actions [GH-27768]
• drivers: handle SIGPIPE in executor to handle possible write errors after client restart [GH-27825]
• identity: fix bug where client identity failed to renew after server upgrade to >=1.11.0 [GH-27773]
• oidc: Fixed a bug where the request cache could be corrupted by concurrent requests with the same nonce [GH-27747]
• tls: fix parsing of combined key files when creating tls expiry metric [GH-27667]

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