MM-43753: Go mod tidy for 1.18 (#20073)

We bump the go.mod version to 1.18
and run go mod tidy.

This is required for using new features.

```release-note
NONE
```

vendor/github.com/andybalholm/brotli/go.mod

@@ -1,5 +0,0 @@
-module github.com/andybalholm/brotli
-
-go 1.12
-
-retract v1.0.1 // occasional panics and data corruption

vendor/github.com/andybalholm/cascadia/go.mod

@@ -1,5 +0,0 @@
-module github.com/andybalholm/cascadia
-
-go 1.16
-
-require golang.org/x/net v0.0.0-20210916014120-12bc252f5db8

vendor/github.com/andybalholm/cascadia/go.sum

@@ -1,7 +0,0 @@
-golang.org/x/net v0.0.0-20210916014120-12bc252f5db8 h1:/6y1LfuqNuQdHAm0jjtPtgRcxIxjVZgm5OTu8/QhZvk=
-golang.org/x/net v0.0.0-20210916014120-12bc252f5db8/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=