test(deps): update dependency buf to v1.70.0 (main)

[renovate]

This PR contains the following updates:

Package	Update	Change
buf	minor	v1.69.0 → v1.70.0

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Release Notes

bufbuild/buf (buf)

v1.70.0

Compare Source

• Add LSP completion for buf.gen.yaml, buf.yaml, and buf.policy.yaml files.
• Fix LSP textDocument/documentSymbol marking every symbol as deprecated.
• Add error for when a dependency is added to buf.yaml and is missing from buf.lock.
• Update the PROTOVALIDATE lint rule support checking NaN in const, in, not_in,
  gt, gte, lt and lte rules for float and double fields.
• Update the PROTOVALIDATE lint rule support to check (buf.validate.message).oneof rules
  and make sure they are well-formed and valid.

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