Verify Client on Connection Handshake (#7057)

* verify client state

* add client state to msgs and retrieve in handler

* fix connection msgs

* fixed handshake tests

* fix tests

* fix sim tests

* revert pb edit

* add ValidateClient tests

* Apply suggestions from code review

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

* fix tests

* fixed msgs test

* use ibctesting for client state consts

* Apply suggestions from code review

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>
Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>

* address rest of comments

* rename to ValidateSelfClient and update spec

* lint

* Update x/ibc/02-client/keeper/keeper_test.go

* Update x/ibc/02-client/keeper/keeper_test.go

* complete rest of review

* improve cov

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

simapp/test_helpers.go

@@ -319,7 +319,7 @@ func CheckBalance(t *testing.T, app *SimApp, addr sdk.AccAddress, balances sdk.C
 // returned.
 func SignCheckDeliver(
 	t *testing.T, txGen client.TxConfig, app *bam.BaseApp, header tmproto.Header, msgs []sdk.Msg,
-	accNums, seq []uint64, expSimPass, expPass bool, priv ...crypto.PrivKey,
+	chainID string, accNums, seq []uint64, expSimPass, expPass bool, priv ...crypto.PrivKey,
 ) (sdk.GasInfo, *sdk.Result, error) {
 
 	tx, err := helpers.GenTx(
@@ -327,7 +327,7 @@ func SignCheckDeliver(
 		msgs,
 		sdk.Coins{sdk.NewInt64Coin(sdk.DefaultBondDenom, 0)},
 		helpers.DefaultGenTxGas,
-		"",
+		chainID,
 		accNums,
 		seq,
 		priv...,