fix: get_delimited_template handles streams as bytes

[k-burt-uch]

Link to JIRA ticket if there is one:

New Features

Breaking Changes

Bug Fixes

• Fixes the /template endpoint to not error when using json file format

Improvements

Dependency updates

Deployment changes

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The style in this PR agrees with black. ✔️

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[coveralls]

Pull Request Test Coverage Report for Build 13417659022

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.5%) to 62.431%

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Totals
Change from base Build 13140530077:	0.5%
Covered Lines:	2373
Relevant Lines:	3801

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💛 - Coveralls

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$$\textcolor{#f14c4c}{\tt{tests/test\_data\_upload.py}}$$	$$\textcolor{#23d18b}{\tt{6}}$$	$$\textcolor{#f14c4c}{\tt{2}}$$	$$\textcolor{#ffa500}{\tt{1}}$$	$$\textcolor{#f14c4c}{\tt{9}}$$
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