eth/filters: uninstall subscription in filter apis on error (#32894)

Fix #32893.

In the previous #32794, it
only handles the pending tx filter, while there are also head and log
filters. This PR applies the patch to all filter APIs and uses `defer`
to maintain code consistency.

Author: hyeonLewis

eth/filters/api.go

@@ -143,6 +143,7 @@ func (api *FilterAPI) NewPendingTransactionFilter(fullTx *bool) rpc.ID {
 	api.filtersMu.Unlock()
 
 	go func() {
+		defer pendingTxSub.Unsubscribe()
 		for {
 			select {
 			case pTx := <-pendingTxs:
@@ -155,7 +156,6 @@ func (api *FilterAPI) NewPendingTransactionFilter(fullTx *bool) rpc.ID {
 				api.filtersMu.Lock()
 				delete(api.filters, pendingTxSub.ID)
 				api.filtersMu.Unlock()
-				pendingTxSub.Unsubscribe()
 				return
 			}
 		}
@@ -218,6 +218,7 @@ func (api *FilterAPI) NewBlockFilter() rpc.ID {
 	api.filtersMu.Unlock()
 
 	go func() {
+		defer headerSub.Unsubscribe()
 		for {
 			select {
 			case h := <-headers:
@@ -403,6 +404,7 @@ func (api *FilterAPI) NewFilter(crit FilterCriteria) (rpc.ID, error) {
 	api.filtersMu.Unlock()
 
 	go func() {
+		defer logsSub.Unsubscribe()
 		for {
 			select {
 			case l := <-logs: