**Apache Airflow version**: 2.0.0

**Kubernetes version (if you are using kubernetes)** (use `kubectl version`): n/a

**Environment**: Linux

- **Cloud provider or hardware configuration**: amd64
- **OS** (e.g. from /etc/os-release): Centos 7
- **Kernel** (e.g. `uname -a`):
- **Install tools**: pip
- **Others**:

**What happened**:

The field `sql` is rendered as a serialized json `["select 1 from dual", "select 2 from dual"]` instead of a list of syntax-highlighted SQL statements.

![image](https://user-images.githubusercontent.com/5377410/106365382-2f8a1e80-6370-11eb-981a-43bf71e7b396.png)

**What you expected to happen**:

`lists` and `dicts` should be rendered as lists and dicts rather than serialized json unless the `template_field_renderer` is `json`

![image](https://user-images.githubusercontent.com/5377410/106365216-f3a28980-636e-11eb-9c48-15deb1fbe0d7.png)


**How to reproduce it**:

```
from airflow import DAG
from airflow.providers.oracle.operators.oracle import OracleOperator

with DAG("demo", default_args={owner='airflow'}, start_date= pendulum.yesterday(), schedule_interval='@daily',) as dag:
    OracleOperator(task_id='single', sql='select 1 from dual')
    OracleOperator(task_id='list', sql=['select 1 from dual', 'select 2 from dual'])
```

**Anything else we need to know**:

Introduced by #11061, .

A quick and dirty work-around:

Edit file [airflow/www/views.py](https://github.com/PolideaInternal/airflow/blob/13ba1ec5494848d4a54b3291bd8db5841bfad72e/airflow/www/views.py#L673)

```
            if renderer in renderers:
-                if isinstance(content, (dict, list)):
+               if isinstance(content, (dict, list)) and renderer is renderers['json']:
                    content = json.dumps(content, sort_keys=True, indent=4)
                html_dict[template_field] = renderers[renderer](content)
```
airflow/www/utils.py
'passwd',
    'authorization',
    'api_key',
    'apikey',
    'access_token',
]
def get_sensitive_variables_fields():
    """Get comma-separated sensitive Variable Fields from airflow.cfg."""
    sensitive_fields = set(DEFAULT_SENSITIVE_VARIABLE_FIELDS)
    sensitive_variable_fields = conf.get('admin', 'sensitive_variable_fields')
    if sensitive_variable_fields:
        sensitive_fields.update({field.strip() for field in sensitive_variable_fields.split(',')})
    return sensitive_fields
def should_hide_value_for_key(key_name):
    """Returns True if hide_sensitive_variable_fields is True, else False"""
    
    if key_name:
        config_set = conf.getboolean('admin', 'hide_sensitive_variable_fields')
        field_comp = any(s in key_name.strip().lower() for s in get_sensitive_variables_fields())
        return config_set and field_comp
    return False
def get_params(**kwargs):
    """Return URL-encoded params"""
    return urlencode({d: v for d, v in kwargs.items() if v is not None})
def generate_pages(current_page, num_of_pages, search=None, status=None, window=7):
    """
    Generates the HTML for a paging component using a similar logic to the paging
    auto-generated by Flask managed views. The paging component defines a number of
    pages visible in the pager (window) and once the user goes to a page beyond the
    largest visible, it would scroll to the right the page numbers and keeps the