Update go toolchain directive to v1.27.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
go (source)	toolchain	minor	1.26.1 → 1.27.0

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Release Notes

golang/go (go)

v1.27.0

v1.26.7

v1.26.6

v1.26.5

v1.26.4

v1.26.3

v1.26.2

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