fix callback err not return

[NameHaibinZhang]

for _, c := range p.callbacks {
	// TODO make the callbacks parallel. ( #3034 )
	if e := c(ctx); e != nil {
		err = errors.Join(err, e)
	}
	if err := ctx.Err(); err != nil {
		rm.Resource = nil
		clear(rm.ScopeMetrics) // Erase elements to let GC collect objects.
		rm.ScopeMetrics = rm.ScopeMetrics[:0]
		return err
	}
}
for e := p.multiCallbacks.Front(); e != nil; e = e.Next() {
	// TODO make the callbacks parallel. ( #3034 )
	f := e.Value.(multiCallback)
	if e := f(ctx); e != nil {
		err = errors.Join(err, e)
	}
	if err := ctx.Err(); err != nil {
		// This means the context expired before we finished running callbacks.
		rm.Resource = nil
		clear(rm.ScopeMetrics) // Erase elements to let GC collect objects.
		rm.ScopeMetrics = rm.ScopeMetrics[:0]
		return err
	}
}

if ctx.Err() is not nil, the c(ctx) err is not return

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: NameHaibinZhang / name: Zhanghaibin (9e8fd14)

[pellared]

Thank you for the PR.

Can you add a changelog entry and add a unit tests to cover these cases?

[NameHaibinZhang]

Thank you for the PR.

Can you add a changelog entry and add a unit tests to cover these cases?

ok，i will add test

[pellared]

@NameHaibinZhang, are you able to work on this PR?

[MrAlias]

Superseded by #6914.