**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
"""Generates a URL to the Graph View for a Dag."""
    dag_id = attr.get('dag_id')
    execution_date = attr.get('execution_date')
    url = url_for('Airflow.graph', dag_id=dag_id, execution_date=execution_date)
    return Markup('<a href="{}">{}</a>').format(url, dag_id) if dag_id else Markup('None')  
def dag_run_link(attr):
    """Generates a URL to the Graph View for a DagRun."""
    dag_id = attr.get('dag_id')
    run_id = attr.get('run_id')
    execution_date = attr.get('execution_date')
    url = url_for('Airflow.graph', dag_id=dag_id, run_id=run_id, execution_date=execution_date)
    return Markup('<a href="{url}">{run_id}</a>').format(url=url, run_id=run_id)  
def pygment_html_render(s, lexer=lexers.TextLexer):  
    """Highlight text using a given Lexer"""
    return highlight(s, lexer(), HtmlFormatter(linenos=True))
def render(obj, lexer):
    """Render a given Python object with a given Pygments lexer"""
    out = ""
    if isinstance(obj, str):
        out = Markup(pygment_html_render(obj, lexer))
    elif isinstance(obj, (tuple, list)):
        for i, text_to_render in enumerate(obj):
            out += Markup("<div>List item #{}</div>").format(i)  
            out += Markup("<div>" + pygment_html_render(text_to_render, lexer) + "</div>")
    elif isinstance(obj, dict):
        for k, v in obj.items():
            out += Markup('<div>Dict item "{}"</div>').format(k)  
            out += Markup("<div>" + pygment_html_render(v, lexer) + "</div>")
    return out
def wrapped_markdown(s, css_class=None):