Upgrade-16 cherry-picks round 3

[gibson042]

git rebase-todo

# Branch pc/as-vow
label base-pc-as-vow
pick b6b5f5f7dd feat(vowTools): add asVow helper
pick 0cdcd5f32b feat(vowTools): asVow should not wrap a vow as a vow
label pc-as-vow
reset base-pc-as-vow
merge -C 0ad10c6e7b pc-as-vow # feat(vowTools): add asVow helper (#9577)

# Branch pc/watch-utils-as-promise
label base-pc-watch-utils-as-promise
pick bf430a12af feat(watchUtils): add asPromise helper
# To resolve conflicts in the following commit:
# * In packages/vow/src/types.js, keep inbound changes and (after that) the
#   definition of VowTools.
# * In packages/vow/test/watch-utils.test.js, keep only inbound changes and
#   limit them to start at "asPromise converts a vow to a promise" (i.e.,
#   just the additions of
#   https://github.com/Agoric/agoric-sdk/pull/9620/files#diff-fd7cabcc7d1097036e2981c3262aa20612bec349f6e418d53324fc33b1b26946 ).
pick c940d5ca73 feat(vowTools): asPromise helper for unwrapping vows
pick 8c27c6725b feat(watchUtils): handle non-storables
pick 3d5a3f3e44 feat(types): EVow
pick 1c0b96468c refactor: don't re-use index
pick 274df1833f fix(vow): clearer stored/non-stored values
pick ff92211d04 refactor: 'extra' field for future properties
label pc-watch-utils-as-promise
reset base-pc-watch-utils-as-promise
merge -C 8edf90288c pc-watch-utils-as-promise # feat(vows): improve handling of ephemeral values (#9620)

and as noted in Slack:

if the #9620 derivative still modifies base-zone to relax PromiseWatcherHandler argument and return patterns from M.any() to M.raw() [which is this PR, and it does], those changes will make it harder to debug any vat code that relies upon e.g. prepareVowKit/prepareVowTools/heapVowTools/heapVowE and either receives or attempts to return a non-storable value, because those scenarios will fail even though the state of the repository makes it look like they should succeed (as they will once the relevant vat(s) are restarted). Looking at dev-upgrade-16, I think that's vat-{ibc,localchain,network,transfer}, so we'll need to keep the gap in mind if such a situation comes up

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