`Development`: Fix alignment of elements to grid issue 2

[mertyldrr]

Checklist

• [x] I added multiple screenshots/screencasts of my UI changes

Motivation and Context

This PR fixes the issue of elements not aligning perfectly on the grid. Issue Number: https://github.com/ls1intum/Apollon/issues/279

Changes include:

• Adjust the coefficients to produce a multiple of ten (each square on the grid has 10px width & height)
• Fix alignment issue with the following elements:
  1. Object in object diagram and communication diagram
  2. Actor in a use case
  3. Transition and place in a Petri net
  4. Input/Output in a flowchart
  5. All elements of a class diagram (not mentioned in the ticket but these were also not perfectly aligned)

Steps for Testing

1. Clone the repo
2. Checkout to branch enhancement/uml-elements-scaling-fix
3. Execute commands: yarn install, followed by yarn start
4. Observe elements mentioned above are aligned with the grid.

Screenshots

Before

After