fix: remove env vars with password (#2300)

## Description

Removes env vars in tests with `PASSWORD` that git guardian was picking
up as secrets.

## Is this change user facing?
NO

## References (if applicable)

core/server/api_container/server/startosis_engine/startosis_interpreter_plan_yaml_test.go

@@ -297,7 +297,6 @@ func (suite *StartosisIntepreterPlanYamlTestSuite) TestExec() {
 			env_vars={
 				"POSTGRES_DB": "kurtosis",
 				"POSTGRES_USER": "kurtosis",
-				"POSTGRES_PASSWORD": "kurtosis",
 			}, 
 			files = {
 				"/root": hi_files_artifact,
@@ -338,8 +337,6 @@ services:
   envVars:
   - key: POSTGRES_DB
     value: kurtosis
-  - key: POSTGRES_PASSWORD
-    value: kurtosis
   - key: POSTGRES_USER
     value: kurtosis
   files:
@@ -679,7 +676,6 @@ func (suite *StartosisIntepreterPlanYamlTestSuite) TestRemoveService() {
 			env_vars={
 				"POSTGRES_DB": "tedi",
 				"POSTGRES_USER": "tedi",
-				"POSTGRES_PASSWORD": "tedi",
 			},
 			files = {
 				"/root": hi_files_artifact,
@@ -724,7 +720,6 @@ func (suite *StartosisIntepreterPlanYamlTestSuite) TestFutureReferencesAreSwappe
 			env_vars={
 				"POSTGRES_DB": "kurtosis",
 				"POSTGRES_USER": "kurtosis",
-				"POSTGRES_PASSWORD": "kurtosis",
 			},
 			files = {
 				"/root": hi_files_artifact,
@@ -773,8 +768,6 @@ services:
   envVars:
   - key: POSTGRES_DB
     value: kurtosis
-  - key: POSTGRES_PASSWORD
-    value: kurtosis
   - key: POSTGRES_USER
     value: kurtosis
   files: