Update golang + golangci-lint to resolve CVEs

[CodesbyUnnati]

This PR resolves the below CVEs:

┌─────────┬────────────────┬──────────┬────────┬───────────────────┬─────────────────┬─────────────────────────────────────────────────────────────┐
│ Library │ Vulnerability  │ Severity │ Status │ Installed Version │  Fixed Version  │                            Title                            │
├─────────┼────────────────┼──────────┼────────┼───────────────────┼─────────────────┼─────────────────────────────────────────────────────────────┤
│ stdlib  │ CVE-2025-61729 │ HIGH     │ fixed  │ v1.25.4           │ 1.24.11, 1.25.5 │ crypto/x509: golang: Denial of Service due to excessive     │
│         │                │          │        │                   │                 │ resource consumption via crafted...                         │
│         │                │          │        │                   │                 │ https://avd.aquasec.com/nvd/cve-2025-61729                  │
│         ├────────────────┼──────────┤        │                   │                 ├─────────────────────────────────────────────────────────────┤
│         │ CVE-2025-61727 │ MEDIUM   │        │                   │                 │ golang: crypto/x509: excluded subdomain constraint does not │
│         │                │          │        │                   │                 │ restrict wildcard SANs                                      │
│         │                │          │        │                   │                 │ https://avd.aquasec.com/nvd/cve-2025-61727                  │
└─────────┴────────────────┴──────────┴────────┴───────────────────┴─────────────────┴─────────────────────────────────────────────────────────────┘

Need to bump the following once their new versions are released, Along with golang 1.25.6-
ytt: v0.52.0
kapp: v0.64.2
kbld: v0.46.0
imgpkg: v0.46.1
kctrl: v0.57.0
vendir: v0.44.0