Rationalise interface for *wait_for_value*

[coretl]

After discussions surrounding #453 and #447 I suggest we make the following changes to the following helpers for signal operations:

• Stop returning the status from set_and_wait_for_*value and instead await it, using timeout for it rather than a separate status_timeout
• Update all the areaDetector usages from:

arm_status = await set_and_wait_for_value(self.acquire, True)
...
await arm_status

to

arm_status = self.acquire.set(True)
await wait_for_value(self.acquire, True)
...
await arm_status

• Support using a match function in set_and_wait_for_value and set_and_wait_for_other_value

That would make the interface:

async def observe_value(
    signal: SignalR[T],
    timeout: float | None = None,
    done_status: Status | None = None) -> AsyncGenerator[T, None]:
    ...

@override
async def observe_signals_value(signal1: SignalR[T], signalR[T2]) -> AsyncGenerator[Tuple[SignalR[T], T] | Tuple[SignalR[T2], T2]]:  # expand this for all combinations like asyncio.gather type stub does
    ...

async def observe_signals_value(
    *signals: SignalR[T],
    timeout: float | None = None,
    done_status: Status | None = None) -> AsyncGenerator[Tuple[SignalR[T], T], None]:
    ...

async def wait_for_value(
    signal: SignalR[T], 
    match_value: T | Callable[[T], bool], 
    timeout: Optional[float] = DEFAULT_TIMEOUT) -> None:
    ...

async def set_and_wait_for_value(
    signal: SignalRW[T], 
    value: T, 
    match_value: T | Callable[[T], bool] | None = None, 
    timeout: Optional[float] = DEFAULT_TIMEOUT) -> None:
    ...

async def set_and_wait_for_other_value(
    signal: SignalW[T],
    value: T, 
    match_signal: SignalR[S],
    match_value: S | Callable[[S], bool], 
    timeout: Optional[float] = DEFAULT_TIMEOUT) -> None:
    ...

[coretl]

And also #402