(refactor) Replace deprecated useSessionUser with useSession

[denniskigen]

Requirements

• This PR has a title that briefly describes the work done, including the ticket number if there is a ticket.
• My work conforms to the OpenMRS 3.0 Styleguide.
• I checked for feature overlap with existing widgets.

Summary

This PR replaces the deprecated useSessionUser function declaration with useSession. This PR does not introduce any functional changes.

Related: openmrs/openmrs-esm-patient-chart#661

[github-actions]

File size impact

Merging chore-react-typings into main impact files as follow:

@openmrs/esm-active-visits-app (no impact)

Files	new size
Unmodified (17)	1.39 MB (0 B / +0%)	👻
Total (17)	1.39 MB (0 B / +0%)	👻

@openmrs/esm-outpatient-app (-0%)

Files	new size
packages/esm-outpatient-app/dist/608.js	124 kB (-4 B / -0%)	↘️
Unmodified (21)	8.08 MB (0 B / +0%)	👻
Total (22)	8.2 MB (-4 B / -0%)	↘️

@openmrs/esm-patient-list-app (-0%)

Files	new size
packages/esm-patient-list-app/dist/414.js	35.7 kB (-4 B / -0.01%)	↘️
packages/esm-patient-list-app/dist/670.js	73.1 kB (-4 B / -0.01%)	↘️
packages/esm-patient-list-app/dist/380.js	190 kB (-12 B / -0.01%)	↘️
Unmodified (24)	1.49 MB (0 B / +0%)	👻
Total (27)	1.79 MB (-20 B / -0%)	↘️

@openmrs/esm-patient-registration-app (no impact)

Files	new size
Unmodified (21)	1.73 MB (0 B / +0%)	👻
Total (21)	1.73 MB (0 B / +0%)	👻

@openmrs/esm-patient-search-app (no impact)

Files	new size
Unmodified (12)	1.12 MB (0 B / +0%)	👻
Total (12)	1.12 MB (0 B / +0%)	👻

_{Generated by @jsenv/file-size-impact during Report bundle size#2197133917 on 1055705}

[brandones]

Thanks @denniskigen !