fix(deps): update module github.com/google/cel-go to v0.18.0

[cilium-renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/google/cel-go	require	minor	v0.17.6 -> v0.18.0

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Release Notes

google/cel-go (github.com/google/cel-go)

v0.18.0

Compare Source

Features

The latest release of CEL introduces validators (#​775) and optimizers (#​804, #​827) and migrates the core CEL internals off of the
protobuf expression and type representations (#​789).

• String format validator [#​775]
• Create a Function that Reverses a String [#​796]
• Introduce pre-order / post-order visitor pattern [#​813]
• Add Libraries() function to Env [#​822]
• Static optimizer for constant folding [#​804]
• Inlining optimizer [#​827]
• FindStructTypeFields support for types.Provider [#​814]

Breaking Changes

The following PR changes the API signature of the checker.AstNode method Expr to return an ast.Expr.

• Migrate the checker.Coster to the ast.Expr [#​798]

Fixes

• Nil safety checks for cel.Ast [#​784]
• Fix cost estimates to propagate result sizes [#​787]
• Catch invalid literals created from expression factories [#​810]
• Ensure stable ordering of overload candidates [#​817]
• Clarify replace with/by empty string [#​820]
• Fix functional exemptions for homogeneous literal checks [#​832]
• Fix logical operator folding that only involve literals [#​833]
• Upgrade go-genproto to latest [#​831]

New Contributors

• @​bboogler made their first contribution in https://github.com/google/cel-go/pull/796

Full Changelog: google/cel-go@v0.17.1...v0.18.0

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