Add support for specifying restate pod tolerations

[pcholakov]

I tried 'just generate-pkl` but it spat out a bunch of errors at me:

❯ just generate-pkl
cargo run --bin schemagen | pkl eval crd/pklgen/generate.pkl -m crd
    Finished dev [unoptimized + debuginfo] target(s) in 0.30s
     Running `target/debug/schemagen`
–– Pkl Error ––
Cannot reference property `isUriString` from here because it is not `const`.

172 | typealias UriString = String(isUriString)
                                   ^^^^^^^^^^^
at pkl.experimental.uri.URI#path (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/pkl.experimental.uri/URI.pkl#L172-172)

To fix, do either of:
1. Add modifier `const` to property `isUriString`
2. Self-import this module, and reference this property from the import.

380 | path = pathPart
             ^^^^^^^^
at pkl.experimental.uri.URI#parse.<function#7>.path (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/pkl.experimental.uri/URI.pkl#L380-380)

159 | path
      ^^^^
at pkl.experimental.uri.URI#toString[#3] (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/pkl.experimental.uri/URI.pkl#L159-159)

154 | function toString(): String = new Listing {
                                    ^^^^^^^^^^^^^
at pkl.experimental.uri.URI#toString (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/pkl.experimental.uri/URI.pkl#L154-162)

218 | when (type is "module") { "This module was generated from the CustomResourceDefinition at <\(baseUri)>." }
                                                                                                 ^^^^^^^^^^
at k8s.contrib.crd.internal.ModuleGenerator#getDocComment[#3] (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/k8s.contrib.crd/internal/ModuleGenerator.pkl#L218-218)

216 | new Listing {
      ^^^^^^^^^^^^^
at k8s.contrib.crd.internal.ModuleGenerator#getDocComment (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/k8s.contrib.crd/internal/ModuleGenerator.pkl#L216-221)

144 | docComment = getDocComment(filteredRootSchema, "module")
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
at k8s.contrib.crd.internal.ModuleGenerator#moduleNode.<function#1>.declaration.docComment (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/k8s.contrib.crd/internal/ModuleGenerator.pkl#L144-144)

60 | docComment?.render(currentIndent),
     ^^^^^^^^^^
at pkl.experimental.syntax.ModuleNode#ModuleDeclarationNode.render (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/pkl.experimental.syntax/ModuleNode.pkl#L60-60)

118 | declaration?.render(currentIndent),
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
at pkl.experimental.syntax.ModuleNode#render (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/pkl.experimental.syntax/ModuleNode.pkl#L118-118)

36 | text = render("")
            ^^^^^^^^^^
at pkl.experimental.syntax.Node#output.text (https://github.com/apple/pkl-pantry/blob/[email protected]/packages/pkl.experimental.syntax/Node.pkl#L36-36)
error: Recipe `generate-pkl` failed on line 52 with exit code 1