Adds jinja2 to dependnecies

[thomasjpfan]

Tracking issue

Follow up to #2360

Why are the changes needed?

In #2360, we removed the cookiecutter dependency, which also removed jinja2. We require jinja2 to construct Flyte Decks.

What changes were proposed in this pull request?

This PR adds jinja2 as as a direct dependency.

How was this patch tested?

I built a Flytekit image without jinja2 installed and got this error:

{"asctime": "2024-05-14 16:16:05,571", "name": "flytekit", "levelname": "ERROR", "message": "Failed to write flyte deck html with error No module named 'jinja2'.", "taskName": null}

Once jinja2 is installed, the FlyteDeck button appears.

For reference the code is here:

flytekit/flytekit/deck/deck.py

Lines 162 to 176 in cc3a7a9

	def get_deck_template() -> "Template":
	from jinja2 import Environment, FileSystemLoader, select_autoescape
	root = os.path.dirname(os.path.abspath(__file__))
	templates_dir = os.path.join(root, "html")
	env = Environment(
	loader=FileSystemLoader(templates_dir),
	# 🔥 include autoescaping for security purposes
	# sources:
	# - https://jinja.palletsprojects.com/en/3.0.x/api/#autoescaping
	# - https://stackoverflow.com/a/38642558/8474894 (see in comments)
	# - https://stackoverflow.com/a/68826578/8474894
	autoescape=select_autoescape(enabled_extensions=("html",)),
	)
	return env.get_template("template.html")

[cosmicBboy]

I'm ok with this, will defer to @eapolinario or @wild-endeavor for second opinion

[cosmicBboy]

the failing seems to be unrelated

[thomasjpfan]

I'm planning to have a follow up PR to remove jinja2 again. I opened this PR to quickly fix the FlyteDeck issue.

[eapolinario]

dbt test failures are unrelated. Tracked in flyteorg/flyte#5351.