Make installHint optional in ExecConfig

[waiyaki]

No description provided.

[waiyaki]

@guaraqe looks like the kubeconfig generated by teleport does not have the installHint in the user exec context.

How can I test this before merging? I've tried updating the ylem/snapshot.yaml file to

   - git: https://github.com/tloncorp/haskell-kubernetes-client.git
-    commit: 8e953f8b2aacec63267cabd6298372c1b2b3315f
+    commit: 6677cbc5980d54ca19ecac048965382e202a2272
     subdirs:
       - kubernetes
       - kubernetes-client

but building fails:

$ stack build --fast solaris:exe:solaris

Warning: Ignoring urbit-hob's bounds on text (>=1.2 && <2) and using text-2.0.2.
         Reason: trusting snapshot over Cabal file dependency information.

Error: [S-4804]
       Stack failed to construct a build plan.

       While constructing the build plan, Stack encountered the following errors. The 'Stack configuration' refers
       to the set of package versions specified by the snapshot (after any dropped packages, or pruned GHC boot
       packages; if a boot package is replaced, Stack prunes all other such packages that depend on it) and any
       extra-deps:

       In the dependencies for kubernetes-client-0.4.3.1:
         * crypton-connection needed, but no version is in the Stack configuration (latest matching version is
           0.3.2).
         * crypton-x509 needed, but no version is in the Stack configuration (latest matching version is 1.7.6).
         * crypton-x509-store needed, but no version is in the Stack configuration (latest matching version is
           1.6.9).
         * crypton-x509-system needed, but no version is in the Stack configuration (latest matching version is
           1.6.7).
         * crypton-x509-validation needed, but no version is in the Stack configuration (latest matching version is
           1.6.12).
       The above is/are needed due to solaris-2.25.4.0 -> kubernetes-client-0.4.3.1

       Some different approaches to resolving some or all of this:

         * Recommended action: try adding the following to your extra-deps in
           /Users/waiyaki/Projects/tlon/tlon/ylem-main/stack.yaml (project-level configuration):

           - crypton-connection-0.3.2@sha256:c7937edc25ab022bcf167703f2ec5ab73b62908e545bb587d2aa42b33cd6f6cc,1581
           - crypton-x509-1.7.6@sha256:c567657a705b6d6521f9dd2de999bf530d618ec00f3b939df76a41fb0fe94281,2339
           - crypton-x509-store-1.6.9@sha256:422b9b9f87a7382c66385d047615b16fc86a68c08ea22b1e0117c143a2d44050,1750
           - crypton-x509-system-1.6.7@sha256:023ed573d82983bc473a37a89e0434a085b413be9f68d07e085361056afd4637,1532
           - crypton-x509-validation-1.6.12@sha256:85989721b64be4b90de9f66ef641c26f57575cffed1a50d707065fb60176f386,2227