Support Go 1.18: Upgrade gqlgen to v0.17.2 (#2443)

* Upgrade gqlgen to v0.17.2

This enables builds on Go 1.18. github.com/vektah/gqlparser is upgraded
to the newest version too.

Getting this to work is a bit of a hazzle. I had to first remove
vendoring from the repository, perform the upgrade and then re-introduce
the vendor directory. I think gqlgens analysis went wrong for some
reason on the upgrade. It would seem a clean-room installation fixed it.

* Bump project to 1.18

* Update all packages, address gqlgenc breaking changes

* Let `go mod tidy` handle the go.mod file

* Upgrade linter to 1.45.2

* Introduce v1.45.2 of the linter

The linter now correctly warns on `strings.Title` because it isn't
unicode-aware. Fix this by using the suggested fix from x/text/cases
to produce unicode-aware strings.

The mapping isn't entirely 1-1 as this new approach has a larger iface:
it spans all of unicode rather than just ASCII. It coincides for ASCII
however, so things should be largely the same.

* Ready ourselves for errchkjson and contextcheck.

* Revert dockerfile golang version changes for now

Co-authored-by: Kermie <kermie@isinthe.house>
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

vendor/github.com/99designs/gqlgen/graphql/context_path.go

@@ -0,0 +1,77 @@
+package graphql
+
+import (
+	"context"
+
+	"github.com/vektah/gqlparser/v2/ast"
+)
+
+const fieldInputCtx key = "path_context"
+
+type PathContext struct {
+	ParentField *FieldContext
+	Parent      *PathContext
+	Field       *string
+	Index       *int
+}
+
+func (fic *PathContext) Path() ast.Path {
+	var path ast.Path
+	for it := fic; it != nil; it = it.Parent {
+		if it.Index != nil {
+			path = append(path, ast.PathIndex(*it.Index))
+		} else if it.Field != nil {
+			path = append(path, ast.PathName(*it.Field))
+		}
+	}
+
+	// because we are walking up the chain, all the elements are backwards, do an inplace flip.
+	for i := len(path)/2 - 1; i >= 0; i-- {
+		opp := len(path) - 1 - i
+		path[i], path[opp] = path[opp], path[i]
+	}
+
+	if fic.ParentField != nil {
+		fieldPath := fic.ParentField.Path()
+		return append(fieldPath, path...)
+
+	}
+
+	return path
+}
+
+func NewPathWithField(field string) *PathContext {
+	return &PathContext{Field: &field}
+}
+
+func NewPathWithIndex(index int) *PathContext {
+	return &PathContext{Index: &index}
+}
+
+func WithPathContext(ctx context.Context, fic *PathContext) context.Context {
+	if fieldContext := GetFieldContext(ctx); fieldContext != nil {
+		fic.ParentField = fieldContext
+	}
+	if fieldInputContext := GetPathContext(ctx); fieldInputContext != nil {
+		fic.Parent = fieldInputContext
+	}
+
+	return context.WithValue(ctx, fieldInputCtx, fic)
+}
+
+func GetPathContext(ctx context.Context) *PathContext {
+	if val, ok := ctx.Value(fieldInputCtx).(*PathContext); ok {
+		return val
+	}
+	return nil
+}
+
+func GetPath(ctx context.Context) ast.Path {
+	if pc := GetPathContext(ctx); pc != nil {
+		return pc.Path()
+	}
+	if fc := GetFieldContext(ctx); fc != nil {
+		return fc.Path()
+	}
+	return nil
+}