update go version minimum

[snissn]

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  • example: fix: mempool: Introduce a cache for valid signatures
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[snissn]

Please note that I had to remove the unsupported linter structcheck and we should use and support the latest linter - unused in additional work. I'm not exactly sure what is triggering the issue, but this PR which is the same but without the linter modification the linter check is failing - unfortu #11150