[pull] main from temporalio:main - #45

## What changed?

Resurrects the `--reset-heartbeats` flag removed from `activity reset` 
in PR #1092, as a new flag `--clear-heartbeat-details`. It controls the 
existing `reset_heartbeat` field on both the single-activity request and
the batch operation, and the proto field is unchanged as
`ResetHeartbeat`.

💥 #1092 also hardcoded `reset_heartbeat: true` on the batch path, 
so batch resets via `--query` always cleared the heartbeat details,
while the
single-activity did not, as the default is to not clear the details.
This change
in behavior was triggered in that PR, and now this new PR reverts the 
default behavior to what was before that PR. Since this change is to
revert an
earlier breaking change, and both PRs happened before the release, 
it should be fine.
Both paths are now controlled by this flag.

Rename `#reset-heartbeats` anchor to `#clear-heartbeat-details` 
for consistency. 

Tests cover the flag on both single activity and batch paths.

## Checklist

**Stability**
- [x] Breaking changes are marked with 💥 in the PR title and release
notes

**Design**
- [x] New flags are named after the API concept, not the implementation
mechanism (good: `--search-attribute`, bad: `--index-field`)
- [x] New flags don't duplicate an existing flag that serves the same
purpose
- [x] New flags do not have short aliases without strong justification

**Help text** (see style guide at the top of `commands.yaml`)
- [x] All flags shown in help text and examples are implemented and
functional

**Tests**
- [x] Added functional test(s) (`SharedServerSuite`)