Side by Side information and Picture in Resume

There is an easy way to do it without hacking or guessing.

You put the 3 elements that make up the header (a logo plus two tables) in boxes. Then assemble the boxes taking into account their relative positions and alignment.

All of this can be accomplished using the package xcoffin that behaves as a graphic layout program (boxes + relative positioning).

For convenience, I defined 3 lengths: the lateral side of the logo, its offset towards the left margin, and the separation between the three elements.

The assembly is done using a collector box (Framex), joining the boxes one to the other while keeping their horizontal alignment

The expressions like (tablesep,0pt) indicates the (X,Y) offsets of the element being joined with respect to the other.

You can change the defined lengths, including the size of the logo, and see how the design adjusts on its own.

I assumed that you set a very small margin to be able to place the logo near the upper left corner. You don't need to do this now, because the package allows you to place "stuff" anywhere on the physical page, so I chose more standard margins.

documentclass[letterpaper]{article}    % Paper Size
usepackage[left=1in,right=1in, top=1in, bottom=1in]{geometry}
raggedbottom   
raggedright    
usepackage{graphicx}           % Images support
graphicspath{ {./assets/} }    % Path to images
%usepackage{multirow}       % Columns spanning multiple rows (https://www.andy-roberts.net/writing/latex/tables)
usepackage[hidelinks]{hyperref}       % Support hrefs

usepackage{xcoffins} %needed
usepackage{kantlipsum} % dummy text

NewCoffinFramex %collector box
NewCoffinLogox
NewCoffinMidTable
NewCoffinRightTable

newlength{logoside}
newlength{logoindent}
newlength{tablesep}

setlength{logoindent}{-0.3in} %shift the  logo into the left margin half its size
setlength{logoside}{0.6in} % size of the logo
setlength{tablesep}{0.1in} % horizontal separation between elements

% filling the boxes with its content
SetHorizontalCoffinLogox{includegraphics[width=logoside, height=logoside]{example-grid-100x100pt}} 

SetHorizontalCoffinMidTable{%
renewcommand{arraystretch}{1.25}  
bfseries
begin{tabular}{l}
    S. P. Sharan 
    National Institute of Technology Tiruchirappalli  
    GitHub : href{https://github.com/Syzygianinfern0}{https://github.com/Syzygianinfern0}    
end{tabular}   
}   

SetHorizontalCoffinRightTable{%   
renewcommand{arraystretch}{1.25}
bfseries       
begin{tabular}{l}
    Major: ECE $|$ Minor: Computer Appl. 
    B. Tech. $mathbf{3^{rd}}$ Year 
    Mail ID : href{mailto:[email protected]}{[email protected]} 
end{tabular}   
}
%***********************************    

% assembling the boxes ************
JoinCoffins*Framex[l,vc]Logox[l,vc](logoindent, -topmargin)
JoinCoffins*Framex[Logox-r,Logox-vc]MidTable[l,vc](tablesep,0pt)
JoinCoffins*Framex[MidTable-r,MidTable-vc]RightTable[l,vc](tablesep,0pt)
%%***********************

begin{document}
noindentTypesetCoffinFramex % type set the assembled set in the header space of the first page

kant[1-7]  

end{document}

The package offer just a few commands and it is very easy to learn and apply.

https://ctan.org/pkg/xcoffins?lang=en