feat: adding dataset start time

[nitrosx]

Description

This PR add the field startTime to raw datasets to match the field endTime.

Motivation

We were using scientific metadata to store start and end time of a data acquisition, without using the endTime field.
We wanted to enforce consistency and have both information in the high level fields of the datasets

Fixes:

• datasets dto and schemas

Tests included

• Included for each change/fix?
• Passing? (Merge will not be approved unless this is checked)

Documentation

• swagger documentation updated [required]
• official documentation updated [nice-to-have]

official documentation info

If you have updated the official documentation, please provide PR # and URL of the pages where the updates are included

[Junjiequan]

Error: ception during run: n [Error]: Max -730985476 should be greater than min 0.
[0]     at y.int (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/@faker-js/faker/dist/cjs/modules/number/index.js:1:859)
[0]     at T.between (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/@faker-js/faker/dist/cjs/modules/date/index.js:1:2136)
[0]     at faker.helpers.multiple.count (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/@faker-js/faker/dist/cjs/modules/date/index.js:1:2482)
[0]     at Function.from (<anonymous>)
[0]     at ee.multiple (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/@faker-js/faker/dist/cjs/modules/helpers/index.js:1:8233)
[0]     at T.betweens (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/@faker-js/faker/dist/cjs/modules/date/index.js:1:2464)
[0]     at Object.<anonymous> (/home/runner/work/scicat-backend-next/scicat-backend-next/test/TestData.js:9:33)
[0]     at Module._compile (node:internal/modules/cjs/loader:1358:14)
[0]     at Module._extensions..js (node:internal/modules/cjs/loader:1416:10)
[0]     at Module.load (node:internal/modules/cjs/loader:1208:32)
[0]     at Module._load (node:internal/modules/cjs/loader:1024:12)
[0]     at Module.require (node:internal/modules/cjs/loader:1233:19)
[0]     at require (node:internal/modules/helpers:179:18)
[0]     at Object.<anonymous> (/home/runner/work/scicat-backend-next/scicat-backend-next/test/Auth.js:2:22)
[0]     at Module._compile (node:internal/modules/cjs/loader:1358:14)
[0]     at Module._extensions..js (node:internal/modules/cjs/loader:1416:10)
[0]     at Module.load (node:internal/modules/cjs/loader:1208:32)
[0]     at Module._load (node:internal/modules/cjs/loader:1024:12)
[0]     at cjsLoader (node:internal/modules/esm/translators:348:17)
[0]     at ModuleWrap.<anonymous> (node:internal/modules/esm/translators:297:7)
[0]     at ModuleJob.run (node:internal/modules/esm/module_job:222:25)
[0]     at async ModuleLoader.import (node:internal/modules/esm/loader:316:24)
[0]     at async formattedImport (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/mocha/lib/nodejs/esm-utils.js:9:14)
[0]     at async exports.requireOrImport (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/mocha/lib/nodejs/esm-utils.js:42:28)
[0]     at async exports.loadFilesAsync (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/mocha/lib/nodejs/esm-utils.js:100:20)
[0]     at async singleRun (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/mocha/lib/cli/run-helpers.js:162:3)
[0]     at async exports.handler (/home/runner/work/scicat-backend-next/scicat-backend-next/node_modules/mocha/lib/cli/run.js:375:5)
[0] wait-on http://localhost:3000/explorer/ && npm run test:api:mocha exited with code 1
--> Sending SIGTERM to other processes..
[1] npm run start exited with code SIGTERM
Error: Process completed with exit code 1.

This error occured too many times. We need to check what is the cause before merge the PR.